Builder&#39;s scaffold.



' 0. KNOERZER.

BUILDER'S SOAFPOLD.

APPLICATION FILED JULY 24, 1011.

1,020,358, Patented Mar. 12, 1912.

UNITED STATES PATENT OFFICE.

OTTO KNOERZER, OF HAMMOND, INDIANA, ASSIGNOR T0 CHAMPION POTATOMACHINERY COMPANY, OF HAMMOND, INDIANA, A CORPORATION OF INDIANA.

BUILDERS SCAFFOLD.

Specification of Letters Patent.

Patented Mar. 12, 1912.

Application filed July 24, 1911. Serial No. 640,109.

To all whom it may concern:

Be it known that I, O'r'ro Knouuznn, a citizen of the United States,residing at Hammond, in the county of Lake and State of Indiana, haveinvented new and useful Improvements in Builders scaffolds, of which thefollowing is a specification.

This invention relates to builders scaffolds, and more particularly tothe brackets of that form of builders scaffolds commonly employed in theerection of frame buildings.

As is well known to those skilled in the art to which this inventionpertains, temporary scaffolding is erected at the sides of a buildingduring its course of construction, said scaffolding affording a platformfor supporting the carpenters that perform work on the outside portionof the building.

One of the objects of this invention is to provide a simple metalbracket of substantial construction, that can be readily secured inplace upon the sheathing of the building, and which, when so attached,will be held securely in place.

Another object is to provide a bracket that can withstand the usualrough usage to which devices of this class are occasioned.

Another object is to prevent side sway of the bracket when secured upona building.

Another object is to provide a form of bracket so arranged that a pairof them can be readily assembled to form a bench support that may standupon the ground.

With these and other objects and advantages in view, this inventionconsists in the several novel features of construction and arrangementhereinafter described and particularly set forth in the claims.

The invention is clearly illustrated in the accompanying drawing, inwhich,

Figure 1 is a perspective view of a bracket embodying one form of myinvention; Fig. 2 is a side view thereof showing the same secured inplace upon a fragment of a wall, the sheathing of which is shown incross section; Fig. 3 is a rear view of the bracket, and Fig. 4c is aplan thereof.

Referring to said drawing the frame of the bracket will be seen tocomprise a right angle bracket structure 10, having a vertical leg 11,and a horizontal leg 12,both preferably constructed of angle iron a ndbraced by an angle plate 13, secured in the angle of the bracket andfurther by a diagonal brace 14, extending substantially to the middle ofthe legs. The angle plate and brace are preferably riveted to the legsto make a strong and substantial construction.

The rear end of the top flange of the horizontal leg projects beyond thevertical leg as shown at 15, and is bent downward into a hook likeformation 16, said hook being arranged to hook over one of the sheathingboards 17, of the wall. Pivotally and slidably secured in the top flangeof the horizontal leg is an anchor hook 18, that projects far enoughbeyond the hook 16, to hook behind a studding 19, of the wall, to form adouble securing means for the bracket. The pivotal end of the anchorhook 18, is bent downward as at 20, and two holes 21, 22, are providedin the top flange of the horizontal leg 12, into either of which thebent end 20, may be inserted, depending on the width of the studding. Toaccommodate the anchor hook to a 2 by 4t studding, the bent end 20,isthrust through the hole 21, and to accommodate a 2 by (3 studding, it isthrust through the hole 22. A small hole is formed at the end of thebent end, through which may be passed a retaining device such as acotter pin, nail or the like 24. lVhen not in use, the anchor hook mayhe slipped down through the hole, as shown in dotted lines in Fig. 2. Iprofor to slightly flatten the corner 25, of the anchor hook to give itadded strength at this point, and further to prevent it from slippingthrough the hole when swung into its inoperative position.

Pivotally secured on the rear side of the vertical leg is a steadyingbar 27, which in its operative position, extends transverse to the planeof the bracket and furnishes a wide bearing against the wall upon whichthe bracket is secured, thereby preventing sidewise swing of thebracket. The pivotal point of the bar is located on one side of itscenter, so that one arm 28, is longer and consequently heavier than theother arm 29. A stop, here shown in the form of a pin 30, secured in oneflange of the vertical leg 11, acts as an abutment against which the baris held by reason of the fact that the heavier arm 29, tends to swingthe lighter one upward, and said stop is so placed that the bar is heldhorizontal when in its operative position. The pivotal connectionbetween the vertical leg and bar is shown in the form of a rivet 31,passing therethrough and located under and to one side of the stop 30.lVhen not in use the bar may be swung into the vertical position shownin dotted lines in Fig. 3.

The outer end of the horizontal leg is bent upward to provide a ledge orstop 32, to guard the planks or boards carried by the bracket, frombeing pushed over the end thereof.

In use, a number of the brackets are secured in horizontal alinementupon the wall, and planks or boards laid thereupon to form ascaffolding. If desired, two brackets may be set side by side on theground with the Vertical leg of one placed at the free end of thehorizontal leg of the-other, and the two secured together to form asupporting frame upon which may be placed one end of a plank or board toprovide a bench or bottom scaffold. I have shown holes 38, in thevertical flange of the horizontal leg. In form ing a supporting frame,the holes in the two brackets may be brought into register, blocks ofwood placed against the horizontal arms and nails driven through theblocks and holes to clamp the two brackets together.

I realize that various alterations and modifications of this device arepossible without departing from the spirit of my invention, and I do nottherefore desire to limit myself to the exact form of construction shownand described.

I claim as new and desire to secure by Letters Patent:

1. A metal bracket of the class described, comprising a horizontal angleiron bar, terminating at one end in a downturned hook for engagementwith a sheathing board, an upright, downwardly projecting angle iron barrigidly secured to said horizontal bar adjacent its hooked end, adiagonal brace, rigidly secured to said angle iron bars, and an anchorhook, having one hooked end for engagement with a studding locatedbehind said sheathing board, and having its other end bent down througha hole in the horizontal angle bar, and there provided with means toprevent its accidental withdrawal, said hook being capable of lying inan operatively connected position in a horizontal plane, and of beingswung into a vertical plane and moved down through the hole so as to liewithin the space occupied by the other members of the bracket.

2. Ametal bracket comprising two bracket members, one having a hook-likeformation, whereby the bracket may be detachably secured upon the wallof a building, a steadying bar pivotally secured between its ends uponthe other member in aplane at right angles to the plane of the bracketmembers, with its pivotal point located to one side of its center, and astop secured to the bracket member upon which said bar is pivoted andacting to hold said bar in a horizontal position transverse to the planeof the bracket, and against the action of its heavier end and therebyform a wide hearing for the bracket, and capable of being moved into thesame plane as the bracket members.

In witness whereof, I have hereunto subscribed my name at Hammond, Lakecounty, Indiana, this 17th day of July 1911.

OTTO KNOERZER.

lVitnesses:

LEONARD KNOERZER, CLAUDE I-I. LASATER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents Washington, D. G.

